Step 2: Replace the Drywall

With the pipe properly insulated, patch the hole in the drywall. After squaring off the hole, install a 2" x 4" cut to length into the existing ceiling. The 2" x 4" will provide a base for attaching the drywall patch (Image 1). Measure the new section of drywall and cut it to size with a utility knife. Slide it in place and secure with screws (Image 2).